covid-19May 23, 2020 Federal officials accuse two groups of selling fake coronavirus vaccines and treatment Federal officials issued warning letters to two groups this week, accusing them of selling fraudulent and unapproved products related to Covid-19. Related posts U.K.'s Johnson launches mass testing…Do you need a Covid-19…What's behind workers' hesitation to…Fully vaccinated people can travel…Younger Latino men are Covid's…Salmonella infections in eight states…Salmonella infections in eight states…The U.S. isn't losing to…Virus-killing robot tested for use…In Covid fight, Cuba touts…